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Staging: strip: delete the driver
[linux/fpc-iii.git] / drivers / usb / host / ehci-hub.c
blobc7178bcde67a99da38c2e08b1b2a8bb4481a7a14
1 /*
2 * Copyright (C) 2001-2004 by David Brownell
3 *
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms of the GNU General Public License as published by the
6 * Free Software Foundation; either version 2 of the License, or (at your
7 * option) any later version.
8 *
9 * This program is distributed in the hope that it will be useful, but
10 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
11 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software Foundation,
16 * Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
17 */
18
19 /* this file is part of ehci-hcd.c */
20
21 /*-------------------------------------------------------------------------*/
22
23 /*
24 * EHCI Root Hub ... the nonsharable stuff
25 *
26 * Registers don't need cpu_to_le32, that happens transparently
27 */
28
29 /*-------------------------------------------------------------------------*/
30
31 #define PORT_WAKE_BITS (PORT_WKOC_E|PORT_WKDISC_E|PORT_WKCONN_E)
32
33 #ifdef CONFIG_PM
34
35 static int ehci_hub_control(
36 struct usb_hcd *hcd,
37 u16 typeReq,
38 u16 wValue,
39 u16 wIndex,
40 char *buf,
41 u16 wLength
42 );
43
44 /* After a power loss, ports that were owned by the companion must be
45 * reset so that the companion can still own them.
46 */
47 static void ehci_handover_companion_ports(struct ehci_hcd *ehci)
48 {
49 u32 __iomem *reg;
50 u32 status;
51 int port;
52 __le32 buf;
53 struct usb_hcd *hcd = ehci_to_hcd(ehci);
54
55 if (!ehci->owned_ports)
56 return;
57
58 /* Give the connections some time to appear */
59 msleep(20);
60
61 port = HCS_N_PORTS(ehci->hcs_params);
62 while (port--) {
63 if (test_bit(port, &ehci->owned_ports)) {
64 reg = &ehci->regs->port_status[port];
65 status = ehci_readl(ehci, reg) & ~PORT_RWC_BITS;
66
67 /* Port already owned by companion? */
68 if (status & PORT_OWNER)
69 clear_bit(port, &ehci->owned_ports);
70 else if (test_bit(port, &ehci->companion_ports))
71 ehci_writel(ehci, status & ~PORT_PE, reg);
72 else
73 ehci_hub_control(hcd, SetPortFeature,
74 USB_PORT_FEAT_RESET, port + 1,
75 NULL, 0);
76 }
77 }
78
79 if (!ehci->owned_ports)
80 return;
81 msleep(90); /* Wait for resets to complete */
82
83 port = HCS_N_PORTS(ehci->hcs_params);
84 while (port--) {
85 if (test_bit(port, &ehci->owned_ports)) {
86 ehci_hub_control(hcd, GetPortStatus,
87 0, port + 1,
88 (char *) &buf, sizeof(buf));
89
90 /* The companion should now own the port,
91 * but if something went wrong the port must not
92 * remain enabled.
93 */
94 reg = &ehci->regs->port_status[port];
95 status = ehci_readl(ehci, reg) & ~PORT_RWC_BITS;
96 if (status & PORT_OWNER)
97 ehci_writel(ehci, status | PORT_CSC, reg);
98 else {
99 ehci_dbg(ehci, "failed handover port %d: %x\n",
100 port + 1, status);
101 ehci_writel(ehci, status & ~PORT_PE, reg);
102 }
103 }
104 }
105
106 ehci->owned_ports = 0;
107 }
108
109 static int ehci_bus_suspend (struct usb_hcd *hcd)
110 {
111 struct ehci_hcd *ehci = hcd_to_ehci (hcd);
112 int port;
113 int mask;
114 u32 __iomem *hostpc_reg = NULL;
115
116 ehci_dbg(ehci, "suspend root hub\n");
117
118 if (time_before (jiffies, ehci->next_statechange))
119 msleep(5);
120 del_timer_sync(&ehci->watchdog);
121 del_timer_sync(&ehci->iaa_watchdog);
122
123 spin_lock_irq (&ehci->lock);
124
125 /* Once the controller is stopped, port resumes that are already
126 * in progress won't complete. Hence if remote wakeup is enabled
127 * for the root hub and any ports are in the middle of a resume or
128 * remote wakeup, we must fail the suspend.
129 */
130 if (hcd->self.root_hub->do_remote_wakeup) {
131 port = HCS_N_PORTS(ehci->hcs_params);
132 while (port--) {
133 if (ehci->reset_done[port] != 0) {
134 spin_unlock_irq(&ehci->lock);
135 ehci_dbg(ehci, "suspend failed because "
136 "port %d is resuming\n",
137 port + 1);
138 return -EBUSY;
139 }
140 }
141 }
142
143 /* stop schedules, clean any completed work */
144 if (HC_IS_RUNNING(hcd->state)) {
145 ehci_quiesce (ehci);
146 hcd->state = HC_STATE_QUIESCING;
147 }
148 ehci->command = ehci_readl(ehci, &ehci->regs->command);
149 ehci_work(ehci);
150
151 /* Unlike other USB host controller types, EHCI doesn't have
152 * any notion of "global" or bus-wide suspend. The driver has
153 * to manually suspend all the active unsuspended ports, and
154 * then manually resume them in the bus_resume() routine.
155 */
156 ehci->bus_suspended = 0;
157 ehci->owned_ports = 0;
158 port = HCS_N_PORTS(ehci->hcs_params);
159 while (port--) {
160 u32 __iomem *reg = &ehci->regs->port_status [port];
161 u32 t1 = ehci_readl(ehci, reg) & ~PORT_RWC_BITS;
162 u32 t2 = t1;
163
164 if (ehci->has_hostpc)
165 hostpc_reg = (u32 __iomem *)((u8 *)ehci->regs
166 + HOSTPC0 + 4 * (port & 0xff));
167 /* keep track of which ports we suspend */
168 if (t1 & PORT_OWNER)
169 set_bit(port, &ehci->owned_ports);
170 else if ((t1 & PORT_PE) && !(t1 & PORT_SUSPEND)) {
171 t2 |= PORT_SUSPEND;
172 set_bit(port, &ehci->bus_suspended);
173 }
174
175 /* enable remote wakeup on all ports */
176 if (hcd->self.root_hub->do_remote_wakeup) {
177 /* only enable appropriate wake bits, otherwise the
178 * hardware can not go phy low power mode. If a race
179 * condition happens here(connection change during bits
180 * set), the port change detection will finally fix it.
181 */
182 if (t1 & PORT_CONNECT) {
183 t2 |= PORT_WKOC_E | PORT_WKDISC_E;
184 t2 &= ~PORT_WKCONN_E;
185 } else {
186 t2 |= PORT_WKOC_E | PORT_WKCONN_E;
187 t2 &= ~PORT_WKDISC_E;
188 }
189 } else
190 t2 &= ~PORT_WAKE_BITS;
191
192 if (t1 != t2) {
193 ehci_vdbg (ehci, "port %d, %08x -> %08x\n",
194 port + 1, t1, t2);
195 ehci_writel(ehci, t2, reg);
196 if (hostpc_reg) {
197 u32 t3;
198
199 spin_unlock_irq(&ehci->lock);
200 msleep(5);/* 5ms for HCD enter low pwr mode */
201 spin_lock_irq(&ehci->lock);
202 t3 = ehci_readl(ehci, hostpc_reg);
203 ehci_writel(ehci, t3 | HOSTPC_PHCD, hostpc_reg);
204 t3 = ehci_readl(ehci, hostpc_reg);
205 ehci_dbg(ehci, "Port%d phy low pwr mode %s\n",
206 port, (t3 & HOSTPC_PHCD) ?
207 "succeeded" : "failed");
208 }
209 }
210 }
211
212 /* Apparently some devices need a >= 1-uframe delay here */
213 if (ehci->bus_suspended)
214 udelay(150);
215
216 /* turn off now-idle HC */
217 ehci_halt (ehci);
218 hcd->state = HC_STATE_SUSPENDED;
219
220 if (ehci->reclaim)
221 end_unlink_async(ehci);
222
223 /* allow remote wakeup */
224 mask = INTR_MASK;
225 if (!hcd->self.root_hub->do_remote_wakeup)
226 mask &= ~STS_PCD;
227 ehci_writel(ehci, mask, &ehci->regs->intr_enable);
228 ehci_readl(ehci, &ehci->regs->intr_enable);
229
230 ehci->next_statechange = jiffies + msecs_to_jiffies(10);
231 spin_unlock_irq (&ehci->lock);
232
233 /* ehci_work() may have re-enabled the watchdog timer, which we do not
234 * want, and so we must delete any pending watchdog timer events.
235 */
236 del_timer_sync(&ehci->watchdog);
237 return 0;
238 }
239
240
241 /* caller has locked the root hub, and should reset/reinit on error */
242 static int ehci_bus_resume (struct usb_hcd *hcd)
243 {
244 struct ehci_hcd *ehci = hcd_to_ehci (hcd);
245 u32 temp;
246 u32 power_okay;
247 int i;
248 u8 resume_needed = 0;
249
250 if (time_before (jiffies, ehci->next_statechange))
251 msleep(5);
252 spin_lock_irq (&ehci->lock);
253 if (!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags)) {
254 spin_unlock_irq(&ehci->lock);
255 return -ESHUTDOWN;
256 }
257
258 if (unlikely(ehci->debug)) {
259 if (!dbgp_reset_prep())
260 ehci->debug = NULL;
261 else
262 dbgp_external_startup();
263 }
264
265 /* Ideally and we've got a real resume here, and no port's power
266 * was lost. (For PCI, that means Vaux was maintained.) But we
267 * could instead be restoring a swsusp snapshot -- so that BIOS was
268 * the last user of the controller, not reset/pm hardware keeping
269 * state we gave to it.
270 */
271 power_okay = ehci_readl(ehci, &ehci->regs->intr_enable);
272 ehci_dbg(ehci, "resume root hub%s\n",
273 power_okay ? "" : " after power loss");
274
275 /* at least some APM implementations will try to deliver
276 * IRQs right away, so delay them until we're ready.
277 */
278 ehci_writel(ehci, 0, &ehci->regs->intr_enable);
279
280 /* re-init operational registers */
281 ehci_writel(ehci, 0, &ehci->regs->segment);
282 ehci_writel(ehci, ehci->periodic_dma, &ehci->regs->frame_list);
283 ehci_writel(ehci, (u32) ehci->async->qh_dma, &ehci->regs->async_next);
284
285 /* restore CMD_RUN, framelist size, and irq threshold */
286 ehci_writel(ehci, ehci->command, &ehci->regs->command);
287
288 /* Some controller/firmware combinations need a delay during which
289 * they set up the port statuses. See Bugzilla #8190. */
290 spin_unlock_irq(&ehci->lock);
291 msleep(8);
292 spin_lock_irq(&ehci->lock);
293
294 /* manually resume the ports we suspended during bus_suspend() */
295 i = HCS_N_PORTS (ehci->hcs_params);
296 while (i--) {
297 temp = ehci_readl(ehci, &ehci->regs->port_status [i]);
298 temp &= ~(PORT_RWC_BITS | PORT_WAKE_BITS);
299 if (test_bit(i, &ehci->bus_suspended) &&
300 (temp & PORT_SUSPEND)) {
301 temp |= PORT_RESUME;
302 resume_needed = 1;
303 }
304 ehci_writel(ehci, temp, &ehci->regs->port_status [i]);
305 }
306
307 /* msleep for 20ms only if code is trying to resume port */
308 if (resume_needed) {
309 spin_unlock_irq(&ehci->lock);
310 msleep(20);
311 spin_lock_irq(&ehci->lock);
312 }
313
314 i = HCS_N_PORTS (ehci->hcs_params);
315 while (i--) {
316 temp = ehci_readl(ehci, &ehci->regs->port_status [i]);
317 if (test_bit(i, &ehci->bus_suspended) &&
318 (temp & PORT_SUSPEND)) {
319 temp &= ~(PORT_RWC_BITS | PORT_RESUME);
320 ehci_writel(ehci, temp, &ehci->regs->port_status [i]);
321 ehci_vdbg (ehci, "resumed port %d\n", i + 1);
322 }
323 }
324 (void) ehci_readl(ehci, &ehci->regs->command);
325
326 /* maybe re-activate the schedule(s) */
327 temp = 0;
328 if (ehci->async->qh_next.qh)
329 temp |= CMD_ASE;
330 if (ehci->periodic_sched)
331 temp |= CMD_PSE;
332 if (temp) {
333 ehci->command |= temp;
334 ehci_writel(ehci, ehci->command, &ehci->regs->command);
335 }
336
337 ehci->next_statechange = jiffies + msecs_to_jiffies(5);
338 hcd->state = HC_STATE_RUNNING;
339
340 /* Now we can safely re-enable irqs */
341 ehci_writel(ehci, INTR_MASK, &ehci->regs->intr_enable);
342
343 spin_unlock_irq (&ehci->lock);
344 ehci_handover_companion_ports(ehci);
345 return 0;
346 }
347
348 #else
349
350 #define ehci_bus_suspend NULL
351 #define ehci_bus_resume NULL
352
353 #endif /* CONFIG_PM */
354
355 /*-------------------------------------------------------------------------*/
356
357 /* Display the ports dedicated to the companion controller */
358 static ssize_t show_companion(struct device *dev,
359 struct device_attribute *attr,
360 char *buf)
361 {
362 struct ehci_hcd *ehci;
363 int nports, index, n;
364 int count = PAGE_SIZE;
365 char *ptr = buf;
366
367 ehci = hcd_to_ehci(bus_to_hcd(dev_get_drvdata(dev)));
368 nports = HCS_N_PORTS(ehci->hcs_params);
369
370 for (index = 0; index < nports; ++index) {
371 if (test_bit(index, &ehci->companion_ports)) {
372 n = scnprintf(ptr, count, "%d\n", index + 1);
373 ptr += n;
374 count -= n;
375 }
376 }
377 return ptr - buf;
378 }
379
380 /*
381 * Sets the owner of a port
382 */
383 static void set_owner(struct ehci_hcd *ehci, int portnum, int new_owner)
384 {
385 u32 __iomem *status_reg;
386 u32 port_status;
387 int try;
388
389 status_reg = &ehci->regs->port_status[portnum];
390
391 /*
392 * The controller won't set the OWNER bit if the port is
393 * enabled, so this loop will sometimes require at least two
394 * iterations: one to disable the port and one to set OWNER.
395 */
396 for (try = 4; try > 0; --try) {
397 spin_lock_irq(&ehci->lock);
398 port_status = ehci_readl(ehci, status_reg);
399 if ((port_status & PORT_OWNER) == new_owner
400 || (port_status & (PORT_OWNER | PORT_CONNECT))
401 == 0)
402 try = 0;
403 else {
404 port_status ^= PORT_OWNER;
405 port_status &= ~(PORT_PE | PORT_RWC_BITS);
406 ehci_writel(ehci, port_status, status_reg);
407 }
408 spin_unlock_irq(&ehci->lock);
409 if (try > 1)
410 msleep(5);
411 }
412 }
413
414 /*
415 * Dedicate or undedicate a port to the companion controller.
416 * Syntax is "[-]portnum", where a leading '-' sign means
417 * return control of the port to the EHCI controller.
418 */
419 static ssize_t store_companion(struct device *dev,
420 struct device_attribute *attr,
421 const char *buf, size_t count)
422 {
423 struct ehci_hcd *ehci;
424 int portnum, new_owner;
425
426 ehci = hcd_to_ehci(bus_to_hcd(dev_get_drvdata(dev)));
427 new_owner = PORT_OWNER; /* Owned by companion */
428 if (sscanf(buf, "%d", &portnum) != 1)
429 return -EINVAL;
430 if (portnum < 0) {
431 portnum = - portnum;
432 new_owner = 0; /* Owned by EHCI */
433 }
434 if (portnum <= 0 || portnum > HCS_N_PORTS(ehci->hcs_params))
435 return -ENOENT;
436 portnum--;
437 if (new_owner)
438 set_bit(portnum, &ehci->companion_ports);
439 else
440 clear_bit(portnum, &ehci->companion_ports);
441 set_owner(ehci, portnum, new_owner);
442 return count;
443 }
444 static DEVICE_ATTR(companion, 0644, show_companion, store_companion);
445
446 static inline void create_companion_file(struct ehci_hcd *ehci)
447 {
448 int i;
449
450 /* with integrated TT there is no companion! */
451 if (!ehci_is_TDI(ehci))
452 i = device_create_file(ehci_to_hcd(ehci)->self.controller,
453 &dev_attr_companion);
454 }
455
456 static inline void remove_companion_file(struct ehci_hcd *ehci)
457 {
458 /* with integrated TT there is no companion! */
459 if (!ehci_is_TDI(ehci))
460 device_remove_file(ehci_to_hcd(ehci)->self.controller,
461 &dev_attr_companion);
462 }
463
464
465 /*-------------------------------------------------------------------------*/
466
467 static int check_reset_complete (
468 struct ehci_hcd *ehci,
469 int index,
470 u32 __iomem *status_reg,
471 int port_status
472 ) {
473 if (!(port_status & PORT_CONNECT))
474 return port_status;
475
476 /* if reset finished and it's still not enabled -- handoff */
477 if (!(port_status & PORT_PE)) {
478
479 /* with integrated TT, there's nobody to hand it to! */
480 if (ehci_is_TDI(ehci)) {
481 ehci_dbg (ehci,
482 "Failed to enable port %d on root hub TT\n",
483 index+1);
484 return port_status;
485 }
486
487 ehci_dbg (ehci, "port %d full speed --> companion\n",
488 index + 1);
489
490 // what happens if HCS_N_CC(params) == 0 ?
491 port_status |= PORT_OWNER;
492 port_status &= ~PORT_RWC_BITS;
493 ehci_writel(ehci, port_status, status_reg);
494
495 /* ensure 440EPX ohci controller state is operational */
496 if (ehci->has_amcc_usb23)
497 set_ohci_hcfs(ehci, 1);
498 } else {
499 ehci_dbg (ehci, "port %d high speed\n", index + 1);
500 /* ensure 440EPx ohci controller state is suspended */
501 if (ehci->has_amcc_usb23)
502 set_ohci_hcfs(ehci, 0);
503 }
504
505 return port_status;
506 }
507
508 /*-------------------------------------------------------------------------*/
509
510
511 /* build "status change" packet (one or two bytes) from HC registers */
512
513 static int
514 ehci_hub_status_data (struct usb_hcd *hcd, char *buf)
515 {
516 struct ehci_hcd *ehci = hcd_to_ehci (hcd);
517 u32 temp, status = 0;
518 u32 mask;
519 int ports, i, retval = 1;
520 unsigned long flags;
521
522 /* if !USB_SUSPEND, root hub timers won't get shut down ... */
523 if (!HC_IS_RUNNING(hcd->state))
524 return 0;
525
526 /* init status to no-changes */
527 buf [0] = 0;
528 ports = HCS_N_PORTS (ehci->hcs_params);
529 if (ports > 7) {
530 buf [1] = 0;
531 retval++;
532 }
533
534 /* Some boards (mostly VIA?) report bogus overcurrent indications,
535 * causing massive log spam unless we completely ignore them. It
536 * may be relevant that VIA VT8235 controllers, where PORT_POWER is
537 * always set, seem to clear PORT_OCC and PORT_CSC when writing to
538 * PORT_POWER; that's surprising, but maybe within-spec.
539 */
540 if (!ignore_oc)
541 mask = PORT_CSC | PORT_PEC | PORT_OCC;
542 else
543 mask = PORT_CSC | PORT_PEC;
544 // PORT_RESUME from hardware ~= PORT_STAT_C_SUSPEND
545
546 /* no hub change reports (bit 0) for now (power, ...) */
547
548 /* port N changes (bit N)? */
549 spin_lock_irqsave (&ehci->lock, flags);
550 for (i = 0; i < ports; i++) {
551 temp = ehci_readl(ehci, &ehci->regs->port_status [i]);
552
553 /*
554 * Return status information even for ports with OWNER set.
555 * Otherwise khubd wouldn't see the disconnect event when a
556 * high-speed device is switched over to the companion
557 * controller by the user.
558 */
559
560 if ((temp & mask) != 0 || test_bit(i, &ehci->port_c_suspend)
561 || (ehci->reset_done[i] && time_after_eq(
562 jiffies, ehci->reset_done[i]))) {
563 if (i < 7)
564 buf [0] |= 1 << (i + 1);
565 else
566 buf [1] |= 1 << (i - 7);
567 status = STS_PCD;
568 }
569 }
570 /* FIXME autosuspend idle root hubs */
571 spin_unlock_irqrestore (&ehci->lock, flags);
572 return status ? retval : 0;
573 }
574
575 /*-------------------------------------------------------------------------*/
576
577 static void
578 ehci_hub_descriptor (
579 struct ehci_hcd *ehci,
580 struct usb_hub_descriptor *desc
581 ) {
582 int ports = HCS_N_PORTS (ehci->hcs_params);
583 u16 temp;
584
585 desc->bDescriptorType = 0x29;
586 desc->bPwrOn2PwrGood = 10; /* ehci 1.0, 2.3.9 says 20ms max */
587 desc->bHubContrCurrent = 0;
588
589 desc->bNbrPorts = ports;
590 temp = 1 + (ports / 8);
591 desc->bDescLength = 7 + 2 * temp;
592
593 /* two bitmaps: ports removable, and usb 1.0 legacy PortPwrCtrlMask */
594 memset (&desc->bitmap [0], 0, temp);
595 memset (&desc->bitmap [temp], 0xff, temp);
596
597 temp = 0x0008; /* per-port overcurrent reporting */
598 if (HCS_PPC (ehci->hcs_params))
599 temp |= 0x0001; /* per-port power control */
600 else
601 temp |= 0x0002; /* no power switching */
602 #if 0
603 // re-enable when we support USB_PORT_FEAT_INDICATOR below.
604 if (HCS_INDICATOR (ehci->hcs_params))
605 temp |= 0x0080; /* per-port indicators (LEDs) */
606 #endif
607 desc->wHubCharacteristics = cpu_to_le16(temp);
608 }
609
610 /*-------------------------------------------------------------------------*/
611
612 static int ehci_hub_control (
613 struct usb_hcd *hcd,
614 u16 typeReq,
615 u16 wValue,
616 u16 wIndex,
617 char *buf,
618 u16 wLength
619 ) {
620 struct ehci_hcd *ehci = hcd_to_ehci (hcd);
621 int ports = HCS_N_PORTS (ehci->hcs_params);
622 u32 __iomem *status_reg = &ehci->regs->port_status[
623 (wIndex & 0xff) - 1];
624 u32 __iomem *hostpc_reg = NULL;
625 u32 temp, temp1, status;
626 unsigned long flags;
627 int retval = 0;
628 unsigned selector;
629
630 /*
631 * FIXME: support SetPortFeatures USB_PORT_FEAT_INDICATOR.
632 * HCS_INDICATOR may say we can change LEDs to off/amber/green.
633 * (track current state ourselves) ... blink for diagnostics,
634 * power, "this is the one", etc. EHCI spec supports this.
635 */
636
637 if (ehci->has_hostpc)
638 hostpc_reg = (u32 __iomem *)((u8 *)ehci->regs
639 + HOSTPC0 + 4 * ((wIndex & 0xff) - 1));
640 spin_lock_irqsave (&ehci->lock, flags);
641 switch (typeReq) {
642 case ClearHubFeature:
643 switch (wValue) {
644 case C_HUB_LOCAL_POWER:
645 case C_HUB_OVER_CURRENT:
646 /* no hub-wide feature/status flags */
647 break;
648 default:
649 goto error;
650 }
651 break;
652 case ClearPortFeature:
653 if (!wIndex || wIndex > ports)
654 goto error;
655 wIndex--;
656 temp = ehci_readl(ehci, status_reg);
657
658 /*
659 * Even if OWNER is set, so the port is owned by the
660 * companion controller, khubd needs to be able to clear
661 * the port-change status bits (especially
662 * USB_PORT_FEAT_C_CONNECTION).
663 */
664
665 switch (wValue) {
666 case USB_PORT_FEAT_ENABLE:
667 ehci_writel(ehci, temp & ~PORT_PE, status_reg);
668 break;
669 case USB_PORT_FEAT_C_ENABLE:
670 ehci_writel(ehci, (temp & ~PORT_RWC_BITS) | PORT_PEC,
671 status_reg);
672 break;
673 case USB_PORT_FEAT_SUSPEND:
674 if (temp & PORT_RESET)
675 goto error;
676 if (ehci->no_selective_suspend)
677 break;
678 if (temp & PORT_SUSPEND) {
679 if ((temp & PORT_PE) == 0)
680 goto error;
681 /* resume signaling for 20 msec */
682 temp &= ~(PORT_RWC_BITS | PORT_WAKE_BITS);
683 ehci_writel(ehci, temp | PORT_RESUME,
684 status_reg);
685 ehci->reset_done [wIndex] = jiffies
686 + msecs_to_jiffies (20);
687 }
688 break;
689 case USB_PORT_FEAT_C_SUSPEND:
690 clear_bit(wIndex, &ehci->port_c_suspend);
691 break;
692 case USB_PORT_FEAT_POWER:
693 if (HCS_PPC (ehci->hcs_params))
694 ehci_writel(ehci,
695 temp & ~(PORT_RWC_BITS | PORT_POWER),
696 status_reg);
697 break;
698 case USB_PORT_FEAT_C_CONNECTION:
699 ehci_writel(ehci, (temp & ~PORT_RWC_BITS) | PORT_CSC,
700 status_reg);
701 break;
702 case USB_PORT_FEAT_C_OVER_CURRENT:
703 ehci_writel(ehci, (temp & ~PORT_RWC_BITS) | PORT_OCC,
704 status_reg);
705 break;
706 case USB_PORT_FEAT_C_RESET:
707 /* GetPortStatus clears reset */
708 break;
709 default:
710 goto error;
711 }
712 ehci_readl(ehci, &ehci->regs->command); /* unblock posted write */
713 break;
714 case GetHubDescriptor:
715 ehci_hub_descriptor (ehci, (struct usb_hub_descriptor *)
716 buf);
717 break;
718 case GetHubStatus:
719 /* no hub-wide feature/status flags */
720 memset (buf, 0, 4);
721 //cpu_to_le32s ((u32 *) buf);
722 break;
723 case GetPortStatus:
724 if (!wIndex || wIndex > ports)
725 goto error;
726 wIndex--;
727 status = 0;
728 temp = ehci_readl(ehci, status_reg);
729
730 // wPortChange bits
731 if (temp & PORT_CSC)
732 status |= 1 << USB_PORT_FEAT_C_CONNECTION;
733 if (temp & PORT_PEC)
734 status |= 1 << USB_PORT_FEAT_C_ENABLE;
735
736 if ((temp & PORT_OCC) && !ignore_oc){
737 status |= 1 << USB_PORT_FEAT_C_OVER_CURRENT;
738
739 /*
740 * Hubs should disable port power on over-current.
741 * However, not all EHCI implementations do this
742 * automatically, even if they _do_ support per-port
743 * power switching; they're allowed to just limit the
744 * current. khubd will turn the power back on.
745 */
746 if (HCS_PPC (ehci->hcs_params)){
747 ehci_writel(ehci,
748 temp & ~(PORT_RWC_BITS | PORT_POWER),
749 status_reg);
750 }
751 }
752
753 /* whoever resumes must GetPortStatus to complete it!! */
754 if (temp & PORT_RESUME) {
755
756 /* Remote Wakeup received? */
757 if (!ehci->reset_done[wIndex]) {
758 /* resume signaling for 20 msec */
759 ehci->reset_done[wIndex] = jiffies
760 + msecs_to_jiffies(20);
761 /* check the port again */
762 mod_timer(&ehci_to_hcd(ehci)->rh_timer,
763 ehci->reset_done[wIndex]);
764 }
765
766 /* resume completed? */
767 else if (time_after_eq(jiffies,
768 ehci->reset_done[wIndex])) {
769 clear_bit(wIndex, &ehci->suspended_ports);
770 set_bit(wIndex, &ehci->port_c_suspend);
771 ehci->reset_done[wIndex] = 0;
772
773 /* stop resume signaling */
774 temp = ehci_readl(ehci, status_reg);
775 ehci_writel(ehci,
776 temp & ~(PORT_RWC_BITS | PORT_RESUME),
777 status_reg);
778 retval = handshake(ehci, status_reg,
779 PORT_RESUME, 0, 2000 /* 2msec */);
780 if (retval != 0) {
781 ehci_err(ehci,
782 "port %d resume error %d\n",
783 wIndex + 1, retval);
784 goto error;
785 }
786 temp &= ~(PORT_SUSPEND|PORT_RESUME|(3<<10));
787 }
788 }
789
790 /* whoever resets must GetPortStatus to complete it!! */
791 if ((temp & PORT_RESET)
792 && time_after_eq(jiffies,
793 ehci->reset_done[wIndex])) {
794 status |= 1 << USB_PORT_FEAT_C_RESET;
795 ehci->reset_done [wIndex] = 0;
796
797 /* force reset to complete */
798 ehci_writel(ehci, temp & ~(PORT_RWC_BITS | PORT_RESET),
799 status_reg);
800 /* REVISIT: some hardware needs 550+ usec to clear
801 * this bit; seems too long to spin routinely...
802 */
803 retval = handshake(ehci, status_reg,
804 PORT_RESET, 0, 1000);
805 if (retval != 0) {
806 ehci_err (ehci, "port %d reset error %d\n",
807 wIndex + 1, retval);
808 goto error;
809 }
810
811 /* see what we found out */
812 temp = check_reset_complete (ehci, wIndex, status_reg,
813 ehci_readl(ehci, status_reg));
814 }
815
816 if (!(temp & (PORT_RESUME|PORT_RESET)))
817 ehci->reset_done[wIndex] = 0;
818
819 /* transfer dedicated ports to the companion hc */
820 if ((temp & PORT_CONNECT) &&
821 test_bit(wIndex, &ehci->companion_ports)) {
822 temp &= ~PORT_RWC_BITS;
823 temp |= PORT_OWNER;
824 ehci_writel(ehci, temp, status_reg);
825 ehci_dbg(ehci, "port %d --> companion\n", wIndex + 1);
826 temp = ehci_readl(ehci, status_reg);
827 }
828
829 /*
830 * Even if OWNER is set, there's no harm letting khubd
831 * see the wPortStatus values (they should all be 0 except
832 * for PORT_POWER anyway).
833 */
834
835 if (temp & PORT_CONNECT) {
836 status |= 1 << USB_PORT_FEAT_CONNECTION;
837 // status may be from integrated TT
838 if (ehci->has_hostpc) {
839 temp1 = ehci_readl(ehci, hostpc_reg);
840 status |= ehci_port_speed(ehci, temp1);
841 } else
842 status |= ehci_port_speed(ehci, temp);
843 }
844 if (temp & PORT_PE)
845 status |= 1 << USB_PORT_FEAT_ENABLE;
846
847 /* maybe the port was unsuspended without our knowledge */
848 if (temp & (PORT_SUSPEND|PORT_RESUME)) {
849 status |= 1 << USB_PORT_FEAT_SUSPEND;
850 } else if (test_bit(wIndex, &ehci->suspended_ports)) {
851 clear_bit(wIndex, &ehci->suspended_ports);
852 ehci->reset_done[wIndex] = 0;
853 if (temp & PORT_PE)
854 set_bit(wIndex, &ehci->port_c_suspend);
855 }
856
857 if (temp & PORT_OC)
858 status |= 1 << USB_PORT_FEAT_OVER_CURRENT;
859 if (temp & PORT_RESET)
860 status |= 1 << USB_PORT_FEAT_RESET;
861 if (temp & PORT_POWER)
862 status |= 1 << USB_PORT_FEAT_POWER;
863 if (test_bit(wIndex, &ehci->port_c_suspend))
864 status |= 1 << USB_PORT_FEAT_C_SUSPEND;
865
866 #ifndef VERBOSE_DEBUG
867 if (status & ~0xffff) /* only if wPortChange is interesting */
868 #endif
869 dbg_port (ehci, "GetStatus", wIndex + 1, temp);
870 put_unaligned_le32(status, buf);
871 break;
872 case SetHubFeature:
873 switch (wValue) {
874 case C_HUB_LOCAL_POWER:
875 case C_HUB_OVER_CURRENT:
876 /* no hub-wide feature/status flags */
877 break;
878 default:
879 goto error;
880 }
881 break;
882 case SetPortFeature:
883 selector = wIndex >> 8;
884 wIndex &= 0xff;
885 if (unlikely(ehci->debug)) {
886 /* If the debug port is active any port
887 * feature requests should get denied */
888 if (wIndex == HCS_DEBUG_PORT(ehci->hcs_params) &&
889 (readl(&ehci->debug->control) & DBGP_ENABLED)) {
890 retval = -ENODEV;
891 goto error_exit;
892 }
893 }
894 if (!wIndex || wIndex > ports)
895 goto error;
896 wIndex--;
897 temp = ehci_readl(ehci, status_reg);
898 if (temp & PORT_OWNER)
899 break;
900
901 temp &= ~PORT_RWC_BITS;
902 switch (wValue) {
903 case USB_PORT_FEAT_SUSPEND:
904 if (ehci->no_selective_suspend)
905 break;
906 if ((temp & PORT_PE) == 0
907 || (temp & PORT_RESET) != 0)
908 goto error;
909
910 /* After above check the port must be connected.
911 * Set appropriate bit thus could put phy into low power
912 * mode if we have hostpc feature
913 */
914 temp &= ~PORT_WKCONN_E;
915 temp |= PORT_WKDISC_E | PORT_WKOC_E;
916 ehci_writel(ehci, temp | PORT_SUSPEND, status_reg);
917 if (hostpc_reg) {
918 spin_unlock_irqrestore(&ehci->lock, flags);
919 msleep(5);/* 5ms for HCD enter low pwr mode */
920 spin_lock_irqsave(&ehci->lock, flags);
921 temp1 = ehci_readl(ehci, hostpc_reg);
922 ehci_writel(ehci, temp1 | HOSTPC_PHCD,
923 hostpc_reg);
924 temp1 = ehci_readl(ehci, hostpc_reg);
925 ehci_dbg(ehci, "Port%d phy low pwr mode %s\n",
926 wIndex, (temp1 & HOSTPC_PHCD) ?
927 "succeeded" : "failed");
928 }
929 set_bit(wIndex, &ehci->suspended_ports);
930 break;
931 case USB_PORT_FEAT_POWER:
932 if (HCS_PPC (ehci->hcs_params))
933 ehci_writel(ehci, temp | PORT_POWER,
934 status_reg);
935 break;
936 case USB_PORT_FEAT_RESET:
937 if (temp & PORT_RESUME)
938 goto error;
939 /* line status bits may report this as low speed,
940 * which can be fine if this root hub has a
941 * transaction translator built in.
942 */
943 if ((temp & (PORT_PE|PORT_CONNECT)) == PORT_CONNECT
944 && !ehci_is_TDI(ehci)
945 && PORT_USB11 (temp)) {
946 ehci_dbg (ehci,
947 "port %d low speed --> companion\n",
948 wIndex + 1);
949 temp |= PORT_OWNER;
950 } else {
951 ehci_vdbg (ehci, "port %d reset\n", wIndex + 1);
952 temp |= PORT_RESET;
953 temp &= ~PORT_PE;
954
955 /*
956 * caller must wait, then call GetPortStatus
957 * usb 2.0 spec says 50 ms resets on root
958 */
959 ehci->reset_done [wIndex] = jiffies
960 + msecs_to_jiffies (50);
961 }
962 ehci_writel(ehci, temp, status_reg);
963 break;
964
965 /* For downstream facing ports (these): one hub port is put
966 * into test mode according to USB2 11.24.2.13, then the hub
967 * must be reset (which for root hub now means rmmod+modprobe,
968 * or else system reboot). See EHCI 2.3.9 and 4.14 for info
969 * about the EHCI-specific stuff.
970 */
971 case USB_PORT_FEAT_TEST:
972 if (!selector || selector > 5)
973 goto error;
974 ehci_quiesce(ehci);
975 ehci_halt(ehci);
976 temp |= selector << 16;
977 ehci_writel(ehci, temp, status_reg);
978 break;
979
980 default:
981 goto error;
982 }
983 ehci_readl(ehci, &ehci->regs->command); /* unblock posted writes */
984 break;
985
986 default:
987 error:
988 /* "stall" on error */
989 retval = -EPIPE;
990 }
991 error_exit:
992 spin_unlock_irqrestore (&ehci->lock, flags);
993 return retval;
994 }
995
996 static void ehci_relinquish_port(struct usb_hcd *hcd, int portnum)
997 {
998 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
999
1000 if (ehci_is_TDI(ehci))
1001 return;
1002 set_owner(ehci, --portnum, PORT_OWNER);
1003 }
1004
1005 static int ehci_port_handed_over(struct usb_hcd *hcd, int portnum)
1006 {
1007 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
1008 u32 __iomem *reg;
1009
1010 if (ehci_is_TDI(ehci))
1011 return 0;
1012 reg = &ehci->regs->port_status[portnum - 1];
1013 return ehci_readl(ehci, reg) & PORT_OWNER;
1014 }
Linux with added FPC-III support